the design was that the character would evolve every time on death, and that the player would explore a new set of problems and pick the evolution to solve that problem to advance, unfortunately the execution kinda lacked since i ran out of time and overscoped a bit. when you evolved the legs you should have seen the evolution in the screen but the HTML version has a bunch of issues, such as the sound/music issue with the music sounding terrible and sounds on top of eachother, in the windows version the music and sfx do play only 1 sound at a time, and yeah the collision problem was something i could not figure out how to solve, it was caused by the "pixel snap" feature and my guess is that it just doesnt like a resolution this small. anyway thanks for playing and rating my game!